Android应用读取Excel文件

public class ReadExcel extends Activity {  
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        // createExcel();  
        // readExcel();  
        writeExcel("mnt/sdcard/test.xls");  
    }  
 
    public void readExcel() {  
        try {  
 
            /** 
             * 后续考虑问题,比如Excel里面的图片以及其他数据类型的读取 
             **/ 
            InputStream is = new FileInputStream("mnt/sdcard/test.xls");  
 
            Workbook book = Workbook  
                    .getWorkbook(new File("mnt/sdcard/test.xls"));  
            book.getNumberOfSheets();  
            // 获得第一个工作表对象  
            Sheet sheet = book.getSheet(0);  
            int Rows = sheet.getRows();  
            int Cols = sheet.getColumns();  
            System.out.println("当前工作表的名字:" + sheet.getName());  
            System.out.println("总行数:" + Rows);  
            System.out.println("总列数:" + Cols);  
            for (int i = 0; i < Cols; ++i) {  
                for (int j = 0; j < Rows; ++j) {  
                    // getCell(Col,Row)获得单元格的值  
                    System.out  
                            .print((sheet.getCell(i, j)).getContents() + "\t");  
                }  
                System.out.print("\n");  
            }  
            // 得到第一列第一行的单元格  
            Cell cell1 = sheet.getCell(0, 0);  
            String result = cell1.getContents();  
            System.out.println(result);  
            book.close();  
        } catch (Exception e) {  
            System.out.println(e);  
        }  
    }  
 
    public void createExcel() {  
        try {  
            // 创建或打开Excel文件  
            WritableWorkbook book = Workbook.createWorkbook(new File(  
                    "mnt/sdcard/test.xls"));  
 
            // 生成名为“第一页”的工作表,参数0表示这是第一页  
            WritableSheet sheet1 = book.createSheet("第一页", 0);  
            WritableSheet sheet2 = book.createSheet("第三页", 2);  
 
            // 在Label对象的构造函数中,元格位置是第一列第一行(0,0)以及单元格内容为test  
            Label label = new Label(0, 0, "test");  
 
            // 将定义好的单元格添加到工作表中  
            sheet1.addCell(label);  
 
            /* 
             * 生成一个保存数字的单元格.必须使用Number的完整包路径,否则有语法歧义 
             */ 
            jxl.write.Number number = new jxl.write.Number(1, 0, 555.12541);  
            sheet2.addCell(number);  
 
            // 写入数据并关闭文件  
            book.write();  
            book.close();  
        } catch (Exception e) {  
            System.out.println(e);  
        }  
    }  
 
    /** 
     * jxl暂时不提供修改已经存在的数据表,这里通过一个小办法来达到这个目的,不适合大型数据更新! 这里是通过覆盖原文件来更新的. 
     *  
     * @param filePath 
     */ 
    public void updateExcel(String filePath) {  
        try {  
            Workbook rwb = Workbook.getWorkbook(new File(filePath));  
            WritableWorkbook wwb = Workbook.createWorkbook(new File(  
                    "d:/new.xls"), rwb);// copy  
            WritableSheet ws = wwb.getSheet(0);  
            WritableCell wc = ws.getWritableCell(0, 0);  
            // 判断单元格的类型,做出相应的转换  
            Label label = (Label) wc;  
            label.setString("The value has been modified");  
            wwb.write();  
            wwb.close();  
            rwb.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
 
    public static void writeExcel(String filePath) {  
        try {  
            // 创建工作薄  
            WritableWorkbook wwb = Workbook.createWorkbook(new File(filePath));  
            // 创建工作表  
            WritableSheet ws = wwb.createSheet("Sheet1", 0);  
            // 添加标签文本  
            // Random rnd = new Random((new Date()).getTime());  
            // int forNumber = rnd.nextInt(100);  
            // Label label = new Label(0, 0, "test");  
            // for (int i = 0; i < 3; i++) {  
            // ws.addCell(label);  
            // ws.addCell(new jxl.write.Number(rnd.nextInt(50), rnd  
            // .nextInt(50), rnd.nextInt(1000)));  
            // }  
            // 添加图片(注意此处jxl暂时只支持png格式的图片)  
            // 0,1分别代表x,y 2,5代表宽和高占的单元格数  
            ws.addImage(new WritableImage(5, 5, 2, 5, new File(  
                    "mnt/sdcard/nb.png")));  
            wwb.write();  
            wwb.close();  
        } catch (Exception e) {  
            System.out.println(e.toString());  
        }  
    }  
}